I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
wyvern fern ferny varna ferine virion
wyvern ern terne serin reran reearn hyperon lierne learn quern kern kerne heron hern ferny fern erne earn rerun tern yearn